Free Access to Huawei.H12-891_V1.0.v2026-06-05.q295 with Valid Practice Test (Page 47)

Question 226

Which of the following statements about SR-MPLS Policy path planning are correct?

A.When planning paths based on bandwidth, you need to set the available bandwidth of each interface in advance.
B.When planning paths based on delay, you must deploy TWAMP or iFIT in advance to measure real-time network delay.
C.If you use the controller to plan SR-MPLS Policy paths, only primary and backup paths can be deployed, and load balancing cannot be implemented for the primary path.
D.When statically planning SR-MPLS Policy paths, you can plan load balancing for the primary path.

Question 227

What are the common ways to learn routing in BGP? ( Multi-select)

A.Introduce static routes
B.Introduced Direct Route
C.BGP routing for other AS is introduced
D.receives neighbor routing information

Question 228

Which of the following statements regarding OSPF neighbor relationship faults is incorrect?

A.For non-DR and non-BDR routers on an Ethernet link, the 2-Way state is acceptable.
B.The Init state indicates that the router has received Hello packets from its neighbors, but the received Hello packets do not contain the OSPF RID of the receiving router.
C.The ExStart state indicates that two neighbor routers have inconsistent MTUs or the same OSPF Router ID (RID).
D.The Attempt state indicates that the router does not send unicast Hello packets to configured neighbors.

Correct Answer: D

Understanding OSPF Neighbor States
OSPF (Open Shortest Path First) establishes neighbor relationships through several states:
1️⃣ Down: No Hello packets received.
2️⃣ Init: Router receives Hello packets but its own Router ID is missing in the received packets.
3️⃣ 2-Way: Routers see each other in Hello packets. (Stable state for non-DR/non-BDR routers).
4️⃣ ExStart: Routers start exchanging LSAs but may face MTU mismatches.
5️⃣ Exchange: Routers send Database Description (DBD) packets to synchronize link-state databases.
6️⃣ Loading: Routers exchange Link-State Requests (LSRs) & Updates (LSUs) to fully sync.
7️⃣ Full: Routers are fully synchronized.
Analysis of the Answer Choices
✅ A. For non-DR and non-BDR routers on an Ethernet link, the 2-Way state is acceptable.
Correct: Non-DR/Non-BDR routers remain in 2-Way state since they don't need to form full adjacency.
✅ B. The Init state indicates that the router has received Hello packets from its neighbors, but the received Hello packets do not contain the OSPF RID of the receiving router.
Correct: If an OSPF router receives a Hello but does not see its own Router ID, it stays in the Init state.
✅ C. The ExStart state indicates that two neighbor routers have inconsistent MTUs or the same OSPF Router ID (RID).
Correct: If MTUs mismatch or RIDs conflict, the DBD exchange fails, causing routers to remain in ExStart state.
❌ D. The Attempt state indicates that the router does not send unicast Hello packets to configured neighbors.
Incorrect:
In Attempt state, routers send unicast Hello packets to manually configured neighbors (common in NBMA networks).
If no Hello responses are received, they remain in Attempt state, but they DO send Hellos.
Real-World Application
OSPF Troubleshooting: Identifying routers stuck in Init or ExStart states can point to MTU mismatches or neighbor misconfigurations.
NBMA Networks (Frame Relay, DMVPN): Manually configured neighbors may stay in Attempt state if Hello packets are lost.
✅ Reference: Huawei HCIE-Datacom Study Guide - OSPF Neighbor States & Troubleshooting

Question 229

In Huawei devices, when SIS introduces external routes and sets external route tags for route information, the Metric type of ISIS does not need to be modified and remains default.

A.True
B.False

Question 230

Which of the following statements is correct about the differences between NSR and NSF?

A.NSR requires the collaboration of neighboring routers.
B.NSF requires the collaboration of neighboring routers.
C.NSF does not require the collaboration of neighboring routers.
D.Both NSR and NSF require the collaboration of neighboring routers.

Question 226

Question 227

Question 228

Question 229

Question 230

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